Spectrally arbitrary tree sign patterns of order 4. Arav, Marina; Hall, Frank; Li, Zhongshan; Kaphle, Krishna; Manzagol, Nilay — 2010 ELA. The Electronic Journal of Linear Algebra [electronic only]
A note on asymptotic contractions. Arav, Marina; Santos, Francisco Eduardo Castillo; Reich, Simeon; Zaslavski, Alexander J. — 2007 Fixed Point Theory and Applications [electronic only]